"Sometime Samurai" is a song written and performed by Japanese music producer Towa Tei and Australian singer Kylie Minogue for Tei's album Flash (2005). It was originally recorded as a demo alongside "GBI (German Bold Italic)" in 1996, but remained unreleased for eight years until Minogue had the opportunity to re-record her vocals in 2003. Before its inclusion on Flash, the song has been mentioned on Minogue's book Kylie: La La La. The song, written about Minogue's then boyfriend, photographer Stéphane Sednaoui.

It was released in Japan as a radio promotional single to promote the release of Flash and since has become one of Tei's most successful songs on radio in Japan, reaching the top ten on the Tokio Hot 100 radio chart. A music video was also made for the song, but did not feature Minogue because she was busy touring her Showgirl: The Greatest Hits Tour.

In 1996, coming back to a studio in Sangenjaya, Setagaya, Japan after going for drinks, Towa Tei received a hand-written fax that had "a picture of some sort" on it that said: "Music with you! Kylie. Call Me". She then came to perform in Japan and met Tei, they tried to make some songs for her album at Sangenjaya. The outputs from the session were "GBI (German Bold Italic)" and a demo of "Sometime Samurai" with Chisato Moritaka's drums part was already being included. "GBI" was later released as a single in 1997, while the other had been left without completion.

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